Thanks to Peter for discovering this - undoubtedly the coolest synth cake ever made (unless you know better). It's a EMS VCS3 (check out the silver Vernier dials, the joystick and the matrix panel full of candles!), that was made for the 80th birthday of Tristram Cary, one of the founders of EMS, who helped invent the VCS3. He's had a very cool career. He was a naval radar officer in WWII, when he started thinking about music made with tapes and electronics.
After the war, he studied and made a living as a composer. He did music for film & tv, working on early Dr Who episodes and Quatermass and the Pit. In 1967 he founded the Electronic Music Studio at the Royal College of Music. In the '80s he moved to Australia and continued composing and wrote the great-sounding-but-very-expensive Illustrated Compendium of Musical Technology. He's now 80, and his neice has a blog, which is why we can all see his cool birthday cake... More on Tristram here. (And more synth cakes here)